Monterotondo to Cassino trains might be a good value for money solution: travelling in Italy by train is often rather cheap and faster than taking a bus indeed Trains leave from Monterotondo-Mentana and arrive at Cassino every 60 minutes on average. If travelling with Trenitalia, you need to know the Monterotondo to Cassino train schedule: the first train leaves at 05:32, while the last ride is at 21:17. A Monterotondo to Cassino train cost about 9.5 €. But how long is the train ride from Monterotondo to Cassino? Your journey takes about 3 hours on average.